Reducing-valve.



No. 634,001. Paiented obi. 3, I899.

- s. anuauson.

REDUCING VALVE.

i tin led 121.26, 18

(Appl ca 0 ii I (No Model.)

. UNITED STATES- PATENT OFFIcn.

GEORGE F. HUGHSON, OF CHICAGO, ILLINOIS.

REDUCING-VALVE.

SPECIFICATION forming part of Letters Eatent No. 634,001, dated October 3, 1899. Application filed January 26 1898. Serial No. 6671957. (No model.)

new and useful Improvements in Reducing- Valves, of which the following is a specification.

The object of this invention is the prod uction of a reducing-valve of few and simple parts, and wherein those parts are not likely to become clogged or to get out of order.

In the accompanying drawings, Figure l is a vertical central section of this reducingvalve. Fig. 2 is alongitudinal section of the valve proper, and Fig. 3 is a transverse section of the same.

Like letters of reference indicate corresponding parts throughout the several views.

A is the outer shell of the reducing-valve, being a casting made in suitable form.

A is a steam-inlet port having communica tion with the boiler.

A and A are coinciding openings throng the walls of the port A. v

A is an opening through the outer shell of the valve in vertical alinementwith and of equal size to the openings A and A A is a chamber, and A an outlet-port for the steam under the reduced pressure of the low-pressure system.

Bisa valve capable of a longitudinal movement through the alined openings A A A, also free to turn in said openings. This valve has the upper cylindrical portion B', the middle webbed portion B composed of three ver.-'

' tical vanes, the two valve-closures B the lower webbed portion B, also composed of three vertical vanes, and the lower stem portion B 1 B is a slight depression in the upper end of the valve B. The valve-closures B are of such size and so arranged as to just coincide with the openings A and A thus closing the valve. 7 C is a bushing screwed onto the upper por-' tion of the shell A, having the central opening 0, extending in alinement with the openings A A and A. 7

C1 is a headed stud lying within and adapt opening it to its full extent.

ed tofit said opening 0, the lower end of the stud resting within the depression or seat B formed in the upper end of the valve B.

O is a condensing-chamber, and C a drippipe. therefor having comm nnication with the outer air.

' D is a coiled compression-spring. D is a housing for said spring, and D is a hand- Wheel having a screw-threaded shank D with aheaded end for engaging and applying pressure to said spring D. The spring D thus lies within the housing D between the stud C and the headed shank D of the hand- Wheel D tension being applied to the spring by turning the said hand-wheel.

I) are air-ports through the walls of the housing D. 4

In the practical application of this device the port A is connected by a pipe with the boiler and the steam-outlet A with the lowpressure system. The spring D is set by the hand-wheel D with reference to the pressure which it is desirable to carry in the low-pressure system, and the spring A, pressing upon the stud C pushes the valve B downward, Steam from the boiler under high pressure passes through the valve B and into the 10 w-pressure chamber A but does not disturb the position of the Valve. When the pressure in the low-pressure system rises to the point for which the spring D is set to operate, the said spring is compressed by that pressure and the valve 13 closes the port A. The port remains closed until the pressure in the low-pressure system falls below the pressure for which the spring D was adjusted, when the force of the spring overcomes the pressure'of said system and the valve B is pushed open to admit more high-pressure steam. It will thus be seen that the valve B is a balanced valve, having atmospheric pressure and the pressure of the spring D at its upper end pressing downward and tending to open it and the pressure of the steam in the low-pressure system exerted upward upon the piston area formed by the lower end of the cylindricalportion B of 'the said valve B tending to close thevalve. The steam in passingthrough' the valve B im-,

pinges on the vanes 13 and B and tends to turn the valve in its seat, making the wear' equal on all sides thereof.

The tension of the spring D may be adjusted to permit any pressure desired in the low-pressure system, and this regardless of variations in the boiler-pressure.

I clairn- In a reducing-valve, in combination, a valve-shell,a steam-inlet pipe projecting within said shell having two alined openings through its Walls, a low-pressure chamber within the valve-shell, a condensing-chamber, and a spring-housing alined with said openings in the inlet-pipe, which low-pressure chamber, condensing-chamber and springhousing have intercomlnunicating openings in their Walls, a cylindrical valve for the alined openings in the inlet-pipe capable of a longitudinal movement therein, which valve has a stem for resting 011 the valve-shell When the valve stands open; also has aportion of its surface removed to permit the passage of steam when the valve is open, and a cylindrical portion with a countersink in the end a stud fixed on one end of said spring, which stud extends through and closes the opening between the housing and the condensingchamber, an opening from the condensing chamber, and a stearn'outlet.,

GEORGE F. HUGHSON'.

lVitnesses:

S. S. STOUT, F. L. STUART. 

